Current guideline. Reaffirmed on January 23, 2016. Endorsed by the American Association of Neuromuscular and Electrodiagnostic Medicine. The National Multiple Sclerosis Society endorsed only the section that relates to the use of plasma exchange for multiple sclerosis.

This guideline is under update. It was last reaffirmed on July 10, 2010. In 2012, a meningitis outbreak was linked to treatment with tainted injectable steroids. For more information, access the AAN Meningitis Outbreak Investigation Toolkit at http://www.aan.com/go/practice/outbreak.